Respirator mask



FIG. 1 is a perspective view of a respirator mask showing my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left elevational view thereof, the right elevational view being a mirror image thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines in the drawings are included for the purpose of illustrating portions of the respirator mask that form no part of the claimed design. 

CLAIM The ornamental design for a respirator mask, as shown and described. 